Add Temp Probes or Jumpers for Temp Probes

[krkeegan]

Given some issues with burning up the bridges, a temperature probe on each one, even an external probe stuck in the heatsink might be helpful. The Firmware could pause or slow down if in an over temp state.

[blurfl]

AUX 5&6 are analog inputs as well as gpios, so no need for a board change 😉. A daughter board with the circuitry for the temp sensor and to switch power for the fan could use one AUX for the temp sensor and the other for the fan control. A 2x3 connector on AUX5&6 would take power, ground and the signals to/from the daughter board. Power for the fan could come from the 12V supply or a separate supply. Using the 12V supply would take some thinking, though...